Over the past decades, the use of plant fibre reinforced composites has increased significantly due to their many attractive attributes such as high specific strength and modulus, wide availability, low cost and high environmental credibility compared to their synthetic counterparts. These attributes are especially attractive for lightweight applications in automotive, marine, aerospace and sporting goods sectors. This growth is expected to continue in the future. To improve the design and performance of bio-based composites, an improved understanding of processing-structure-property relations in such bio-based composites is required, the fibres being the key component of the composite to obtain performing properties. This is due to the sensitivity of the constituent plant fibres to mechanical stress (pressure), temperature, water and other parameters. The purpose of this review is to critically synthesise literature on the impact of composites processing steps on plant fibre cell wall structure and properties. The impact of plant fibre composites processing steps from the polymer impregnation stage right through to the end-of-life recycling stage is reviewed. Additionally, mechanical, morphological and hygroscopic properties of plant fibres are considered in conjunction with process times, temperature and shear rate. This review will aid process and product designers to develop new performing plant fibre composite products, taking into account the process parameters to select the most optimised process and (their effects on) plant fibres. Considering how fibre properties change with biocomposites processing steps is indeed essential to understanding the links between the micro and macro scales, and to be able to design optimised plant fibre composite materials.

在过去的几十年中，由于植物纤维增强复合材料具有许多吸引人的特性，例如与合成材料相比具有较高的比强度和模量，广泛的可用性，低成本和较高的环境信誉，因此其使用已显着增加。这些属性对于汽车，船舶，航空航天和体育用品领域的轻型应用特别有吸引力。预计这种增长将在未来继续。为了改善生物基复合材料的设计和性能，需要对这种生物基复合材料中的加工-结构-性能关系有更好的了解，纤维是复合材料获得性能的关键成分。这是由于组成植物纤维对机械应力（压力），温度，水和其他参数。这篇综述的目的是批判性地合成有关复合材料加工步骤对植物纤维细胞壁结构和特性的影响的文献。综述了植物纤维复合材料加工步骤从聚合物浸渍阶段一直到寿命终止回收阶段的影响。另外，还考虑了植物纤维的机械，形态和吸湿性能以及加工时间，温度和剪切速率。该审查将帮助工艺和产品设计师开发性能最佳的植物纤维复合材料产品，同时要考虑工艺参数以选择最优化的工艺和对植物纤维的影响。